Underfeed fuel-stocker.



G. WEILAND.

UNDERPBED FUEL STOKER. APPLICATION FILED JAN, 14, 1909.

931,536. Patented Aug. 17, 1909.

q Q a i g? \\1 k a M x Q ii #1 Q I W A wi tueooeo I UNITED STATES PATENT OFFICE.

I GUSTAVE WEILAND, OF STOCKTON, CALIFORNIA.

No. 931,536. Specification of Letters Patent. Patented Aug. 17, 1909. v

Application filed January 14, 1909-. Serial No. 472,360.

To-all whom it may concern: 5, is arranged a fire door, 10, the same being Be it known that I, Gus revs WEILAND, a also used as an air inlet. On the inner side i citizen of the United States, residing at of the front wall of the furnace, immedi- Stockton, in the county of San Joaquin and ately over thedoor, 10, is arranged a downto State of California, have invented certain wardly and inwardly inclined deflecting new and useful Improvements in Underfeed plate, 12, by means of which the draft of airy Fuel-Stokers; and I do'declare the following entering thedoor is directed downwardly.

to'be a full, clear, and exact description of Theouter end of the tube, 5, is preferabl a the invention, such as will. enable others supported upon a suitable standard, 13, an 5 10' skilled in the art to which it appertains to to said outer end of the tube is adapted to make and use the same. be connected the end of a plunger cylinder, i TlllS invention relates to-improvements in 14, in which is slidably mounted the recipro- 1 underfeed fuel stokers. eating plunger, 15. Connected to the upper 'Ilheobject. of the invention is to provide side of the cylinder, 14, substantially mid- 70,

a fuel stoker of this character by means of way between its ends is a feed hopper, 16,

which wet or dry saw dust, shavings, tan in which the saw. dust or other fuel is placed. bark, straw or similar material may be The plunger 15 .is of preferably hollow readily consumed in the furnace to which metal construction and on its forward end the stoker is applied and an intense, uniform is provided with a beveled flange forming 7 5 heat produced from the burning of inch a sharp cutting edge, 17. To the outer refuse material. end of the plunger is connected the inner A further object is to provide means end of a plunger rod, 18, the outer end'of whereby the plunger of the stoker will be which is connected to a suitable operating prevented from becoming clogged by small mechanism which is here shown and is pref- 0 blocks or chips. erably in the form of a crank, 19, arranged With these objects in view, the invention on a drive shaft, 20, mounted in a suitable consists of certain novel features-of construcsupport, 21, and operated by any suitable tion, combination and arrangement of parts driving mechanism, not shown. as will be described hereinafter and particu- The cylinder 14 is supported uponj suit- V larly pointed in the appended claims: able standards 22 and in the upper side of In theaccompanying drawings, Figure 1 the cylinder is formed an opening 23 which is a central vertical longitudinal sectional extends from the rear side of the hopper to a view of the stoker showing the same applied point beyond the front wall thereof. The to a furnace; and F i 2 1s a horizontal secs portion of the opening 23 beyond the hopper, 9 tional view through the furnace taken above is surrounded on three sides by an upwardly the stoker and showing a topplan view of projectin flange 24' and is covered by a the latter. ,1 movable lid or plate 25 pivoted within said .Referringmore articiilarly to the drawflange. The end of'the plate adjacent to ings,-1denotes' a f iirnace which may be of the hopper curves upwardly as at 26, and 40 any suitable,construction, and is here shown forms a closure for an opening 27 in the as consisting of a fire box, 2, beneath which side of the hopper and communicating is arrangedan ash pit, 3, and iii the rear of with the opening, 23, in the cylinder, as said ash pit and fire box isarranged a shown, The opposite end of the plate 25 bridge wall, 4. Above the fire box is aris hingedly mounted in the outer end of the 4 ranged the boiler, 5. f J flanged enclosure above the opening, 25; Adapted to ,project through the front wall and said plate is yieldingly held down in of the ash pit is a fuel feeding tube, 5, the a closed position by means of'a spring, 28. inner end of which inclines upwardly as By means of ,the plate, 25, any chips or shown at 6, and is provided on its upper small blocks which may become caught by 5 edge with supporting flanges, 7, adapted to the end ofyf'the plunger /will be prevented enga e and rest u on su ortin bars, 8, from 010 ging and stoppin the plunger, as securid to the front 'wall o f the fu rnace and when saii l chips or blocks a e forced against the bridge wall, as shown. In the lower end the underside of the plate by the movement of the inclined portion 6 of the feed tube of the plunger, the plate will swing up- 1 is arranged aclean-out-door, 9. In the front wardly against the tension of the spring, of the furnace, immediately above the tube, 28, which'will allow the block to be forced feed tube, said cylinder having an opening anism, it is obvious that the same may be operated by hand to reciprocate the'plunger and thereby force the saw dust or other fuel through the cylinder and into the feed tube, 5, from whence it passes upwardly through the inclined portion 6 of the tube and into the fire box of the furnace.

While the device has been shown and described as being applied to a boiler furnace, it is obvious that the same may be applied to any style of furnace or to stoves of suitable construction and that a perfect combustion may be'maintained and the heat of the furnace kept uniform and intense, because, the constant replacing of the consumed fuel by my improved underfeed stoker obviates the necessity of opening any tools for supplying fuel, and thereby reducing the temperature of the furnace.

Having thus described my invention, what I claim as new, and desire to secure by Letters-Patent, is:

1. In an under feed fuel stoker, the combiuation of a feed tube adapted to be arranged in the ash pit of the furnace and to communicate at its inner openend with the tire-box thereof, a plunger cylinder adapted to communicate with the outer end of said formed in its u er side a ho er arran ed on the upper side of sald cylinder over a.

portion of the opening thercm and havlng ranged'in the ash pit of a furnace, and to front wall of the hopper to prevent coarse 5 pieces of fuel caught by the plunger from clogging the cylinder. 2. In an under feed fuel stoker, the combination of a feed tube adapted to be aropen into the fire box thereof, a plunger cylinderadapted to be connected to the outer end of said feed tube, said cylinder having an opening formed in itsupper side, a flange arranged around three sides of a portion of said opening, a hopper communicating with the unflanged portion of the cylinder opening, a hinged plate adapted to close the flanged portion of said opening and having an upwardly curved end to bear against the front of the hopper and form a closure for the opening therein, a sprin arranged to yieldably hold said plate in c osed position, a plunger slidably mounted in said cylinder, and means for reciprocating said plunger.

In testimony whereof I have hereunto set my hand in presence of two subscribing i witnesses.

Vitnesses l-tonnu'r MEYER, Batu-\ssaan GIOT'IOURNI. 

